[MPlayer-users] BUG: CVS mencoder barfs at end of DVD-stream.dump
Hans Meine
hans_meine at gmx.net
Tue Jul 8 17:11:58 CEST 2003
Hi!
I recently wanted to experiment with aspect-stuff encoding a DVD, which I
ripped with mplayer into a stream.dump (a whole title). But two-pass encoding
would not work, because several (each four-hour-long :-( ) tries ended in an
invalid divx2pass.log after pass one.
I found out that the bug is triggered by the end of the file, encoding ANY
part before the last frame works. So I dd'ed the last mbs and uploaded them
as "movie_end.vob" and a description as "movie_end.txt". Part of the latter
follows:
BUG with CVS HEAD mencoder (0.90rc5-3.2.2 works on the same file):
* first >90% of divx2pass.log is overwritten with zero bytes after creation,
before quitting; run
mencoder -v -ovc lavc -lavcopts
vcodec=mpeg4:vbitrate=840:vhq:v4mv:vmax_b_frames=2:vb_strategy=1:vpass=1
-nosound -o /dev/null movie_end.vob
to get this error (output zeroes.log.gz attached), result was the following
divx2pass.log:
{28672 ZERO BYTES HERE}x:0 mv:18 misc:1647 fcode:1 bcode:1 mc-var:0 var:3240
icount:0;
in:253 out:254 type:3 q:5.000000 itex:0 ptex:0 mv:0 misc:9 fcode:1 bcode:1
mc-var:0 var:0 icount:0;
in:256 out:255 type:2 q:3.000000 itex:0 ptex:0 mv:56 misc:1704 fcode:1 bcode:1
mc-var:0 var:3240 icount:0;
in:255 out:256 type:3 q:5.000000 itex:0 ptex:0 mv:0 misc:28 fcode:1 bcode:1
mc-var:0 var:0 icount:0;
in:258 out:257 type:2 q:3.000000 itex:0 ptex:0 mv:18 misc:1647 fcode:1 bcode:1
mc-var:0 var:3240 icount:0;
in:257 out:258 type:3 q:5.000000 itex:0 ptex:0 mv:0 misc:9 fcode:1 bcode:1
mc-var:0 var:0 icount:0;
in:260 out:259 type:2 q:3.000000 itex:0 ptex:0 mv:56 misc:1704 fcode:1 bcode:1
mc-var:0 var:3240 icount:0;
in:259 out:260 type:3 q:5.000000 itex:0 ptex:0 mv:0 misc:28 fcode:1 bcode:1
mc-var:0 var:0 icount:0;
* if I remove the b-frames stuff, mencoder crashes instead. Run for
example (w/o v4mv,vhq too):
mencoder -v -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=840:vpass=1 -nosound
-o /dev/null movie_end.vob
(output wo_options.log.gz attached)
* the file was dd'ed from the end of a stream.dump created by mplayer
from a whole DVD title. It is the end, because encoding any part
before that works.
* actually, this last part of the movie contains 265 frames, and the
error is at the end. Working around it by adding "-frames 264" to
the above commandlines works!
* if the file is broken (as it seems), recall that it was saved by mplayer, so
there might still be a bug?
--
Ciao, / /
/--/
/ / ANS
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